Lewis & Short

invĭcem, in MSS. and edd. often separately, in vĭcem (poet. in tmesi: inque vicem, Verg. G. 4, 166; id. A. 12, 502; Ov. M: 6, 631; 9, 525; id. Her. 17, 180; Stat. Th. 2, 149; 7, 817 al.), adv. [in-vicis].

  1. I. Prop., by turns, in turn, one after another, alternately (class., but not in Cic.; syn. vicissim): hi rursus in vicem anno post in armis sunt: illi domi remanent, Caes. B. G. 4, 1, 5; 7, 85, 5; Hirt. B. G. 8, 6, 4: defatigatis invicem integri succedunt, Caes. B. G. 7, 85: cum timor atque ira invicem sententias variassent, Liv. 2, 57: Etruscos, multis invicem casibus victos victoresque, id. 2, 44: regio invicem a suis atque hoste vexata, Curt. 3, 8, 8: periculum invicem metuens, Suet. Aug. 10: invicem eum odero, id. Tib. 28: praebens invicem aurem, id. Calig. 22: invicem alternis diebus modo aqua, modo vinum, Cels. 3, 2: invicem modo sedere, modo ingredi, id. 4, 24.
  2. II. Transf., one another, each other, mutually, reciprocally (mostly post-Aug.; syn. inter se): ibi se cognoscunt fratres invicem, Plaut. Men. Arg. 10: Aricini atque Ardeates multis invicem cladibus fessi, Liv. 3, 71, 2: adhortatio invicem totam invasit aciem, id. 6, 24, 7; 9, 3, 4; 41, 3, 3: multum sanguinem invicem hausimus, Curt. 4, 14, 17: invicem amare, Plin. Ep. 4, 1, 2; 7, 20, 7: vixerunt mira concordia, per mutuam caritatem et invicem se anteponendo, Tac. Agr. 6 init.: invicem se occidere, Eutr. 1, 10; Just. 11, 9, 13; cf.: invicem inter se gratantes, Liv. 9, 43, 17: haec invicem obstant, Quint. 4, 5, 13: homines, manibus invicem apprehensis, gradum firmant, id. 9, 4, 129: invicem ardentius diligere, Plin. Ep. 7, 20, 7:
    Note:invicem se ad amorem exacuere, id. ib. 3, 7 fin.: invicem permutatae O atque U, Quint. 1, 4, 16: cuncta invicem hostilia, i. e. on both sides, Tac. H. 3, 46.
    1. B. Esp.
      1. 1. Ad invicem (post-class.), instead of, Veg. Vet. 2, 7 fin.
      2. 2. Ad invicem, mutually: caritatem illorum ad invicem, Vulg. 2 Macc. 25, 32; ib. Luc. 2, 15; ib. Gen. 42, 21; so, in invicem, ib. Joan. 6, 43; ib. Rom. 1, 27: ab invicem, ib. Matt. 25, 32; ib. Dan. 13, 14: pro invicem, ib. 1 Cor. 12, 25.